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<ri:Resource created="2011-10-10T12:52:34Z" status="active" updated="2025-05-19T09:50:00Z" version="1.2" xmlns:cs="http://www.ivoa.net/xml/ConeSearch/v1.0" xmlns:ri="http://www.ivoa.net/xml/RegistryInterface/v1.0" xmlns:vr="http://www.ivoa.net/xml/VOResource/v1.0" xmlns:vs="http://www.ivoa.net/xml/VODataService/v1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.ivoa.net/xml/ConeSearch/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/ConeSearch.xsd http://www.ivoa.net/xml/VOResource/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/VOResource.xsd http://www.ivoa.net/xml/VODataService/v1.1 http://vo.ari.uni-heidelberg.de/docs/schemata/VODataService.xsd" xsi:type="vs:CatalogService"><title>15GHz monitoring of AGN jets with VLBA</title><shortName>J/AJ/137/3718</shortName><identifier>ivo://CDS.VizieR/J/AJ/137/3718</identifier><altIdentifier>doi:10.26093/cds/vizier.51373718</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Lister M.L.</name></creator><creator><name>Aller H.D.</name></creator><creator><name>Aller M.F.</name></creator><creator><name>Cohen M.H.</name></creator><creator><name>Homan D.C.</name></creator><creator><name>Kadler M.,Kellermann K.I.</name></creator><creator><name>Kovalev Y.Y.</name></creator><creator><name>Ros E.</name></creator><creator><name>Savolainen T.</name></creator><creator><name>Zensus J.A.,Vermeulen R.C.</name></creator><date role="Updated">2018-01-04T08:23:05Z</date><date role="Created">2011-10-10T12:52:34Z</date><contact><name>CDS support team</name><address>CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France</address><email>cds-question@unistra.fr</email></contact></curation><content><subject>radio-sources</subject><subject>bl-lacertae-objects</subject><subject>active-galactic-nuclei</subject><subject>quasars</subject><description>We present images from a long-term program (MOJAVE: Monitoring of Jets in active galactic nuclei (AGNs) with VLBA Experiments) to survey the structure and evolution of parsec-scale jet phenomena associated with bright radio-loud active galaxies in the northern sky. The observations consist of 2424 15GHz Very Long Baseline Array (VLBA) images of a complete flux-density-limited sample of 135 AGNs above declination -20{deg}, spanning the period 1994 August to 2007 September. These data were acquired as part of the MOJAVE and 2cm Survey programs, and from the VLBA archive. The sample-selection criteria are based on multi-epoch parsec-scale (VLBA) flux density, and heavily favor highly variable and compact blazars. The sample includes nearly all the most prominent blazars in the northern sky, and is well suited for statistical analysis and comparison with studies at other wavelengths. Our multi-epoch and stacked-epoch images show 94% of the sample to have apparent one-sided jet morphologies, most likely due to the effects of relativistic beaming. Of the remaining sources, five have two-sided parsec-scale jets, and three are effectively unresolved by the VLBA at 15GHz, with essentially all of the flux density contained within a few tenths of a milliarcsecond.</description><source format="bibcode">2009AJ....137.3718L</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/137/3718</referenceURL><type>Catalog</type><contentLevel>Research</contentLevel><relationship><relationshipType>IsServedBy</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/TAP">TAP VizieR generic service</relatedResource></relationship><relationship><relationshipType>IsServedBy</relationshipType><relatedResource>Conesearch service</relatedResource></relationship><relationship><relationshipType>related-to</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/130/1389">J/AJ/130/1389 : Linear polarization of AGN jets at 15GHz (Lister+, 2005)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/131/1262">J/AJ/131/1262 : Circular polarization of AGN jets at 15GHz (Homan+, 2006)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJS/171/376">J/ApJS/171/376 : MOJAVE. III. VLA 1.4GHz images (Cooper+, 2007)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/138/1874">J/AJ/138/1874 : MOJAVE. VI. Kinematic analysis of blazar jets (Lister+, 2009)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/706/1253">J/ApJ/706/1253 : MOJAVE VII. Blazar jet acceleration (Homan+, 2009)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/710/764">J/ApJ/710/764 : Extended radio emission in MOJAVE blazars (Kharb+, 2010)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/722/L7">J/ApJ/722/L7 : Fermi/LAT detected MOJAVE AGNs (Pushkarev+, 2010)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/545/A113">J/A+A/545/A113 : MOJAVE IX. 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